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Percentage of lead in lead pencil is :...

Percentage of lead in lead pencil is :

A

Zero

B

20

C

80

D

70

Text Solution

Verified by Experts

The correct Answer is:
A
Lead is not present in lead pencil. It is a misnomer.
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Knowledge Check

  • The lead of lead pencils melts at

    A
    `2000^(@)C`
    B
    `350^(@)C`
    C
    `3170^(@)C`
    D
    `75^(@)C`

  • There are different categories of lead pencil like 4B, 3B, 2B, HB, H, 2H, 3H and 4H (where B indicates softness and H indicates hardness). Which of the following statements is correct if all these varieties of lead pencil are made of different kinds of lead?

    A
    Impurity content increases from 4B to 4H.
    B
    lmpurity content decreases from 4B to 4H.
    C
    Impurities have no impact on hardness.
    D
    All are incorrect

  • There are different categories of lead pencil like 4B, 3B, 2B, HB, H, 2H, 3H and 4H (where B indicates softness and H indicates hardness). Which of the following statements is correct if all these varieties of lead pencil are made of different kinds of lead?

    A
    Impurity content increases from 4B to 4H.
    B
    lmpurity content decreases from 4B to 4H.
    C
    Impurities have no impact on hardness.
    D
    All are incorrect

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    There are different categories of lead pencil like 4B, 3B, 2B, HB, H, 2H, 3H and 4H (where B indicates softness and H indicates hardness). Which of the following statements is correct if all these varieties of lead pencil are made of different kinds of lead?

    Lead pencil contains

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